Improvement in pumps



UNITED STATES PATENT OFFICE.

ANDREW J. REYNOLDS, OF STURGIS, MICHIGAN.

IMPROVEMENT IN PUMPS.

Speciiication forming part 0f Letters Patent No. 42,686, dated May 10, 1861.

To all whom it may concern:

Bc it known that I, ANDREW J. REYNOLDS, of Sturgis, St. Joseph county, Michigan, have invented a new and usef'ul Improvement in Pumps; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings ,making partot'this specification.

This improvement relates to the class of double-acting lift and force pumps adapted for immersion in a well or cistern 5 and my invention consists in, first, the provision of a single receivingpassage, obtained by gaining on the side pipe near its lower end, so as to form a two-way upanddown inlet tor asingle doubleheaded receiving valve, and so as to permit of a closed bottom, thus avoiding the roiling ofthe water consequent on the disturbance and pumping up ot' the sediment; second, a mode of constructing and introducing Amy receivingvalve the same being seltcmptying, as hereinafter explained.

Figure l is an axial section ot' a pump embodying my invention. Fig. 2 shows the double-headed inlet-valve detached.

The cylinder A is a simple casting, closed at top, except at the point of passage for the pistonrod B, which rod I prefer to have hollow, so as to serve for a discharging pipe. The cylinder A and side pipe, C Uf, are closed at bottom by a single blank-head, D. The portions C and C of the side pipe communicate, respectively, with the upper and lower portions of the cylinder in the usual manner, and with the well or cistern by means of a single inlet, E, formed by a gap or gain 1n the side pipe near its lower end. The ports by which the water from the inlet E enters the side pipe are formed into seats F F for a doubleheaded inlet-valve, G, constructed and insel ted as follows: The upper disk or head, al, being introduced to the upper portion, C, of the side pipe from the cylinder, is secured by a screwbolt, b, to the lower head, a', which has been introduced from the cylinder to the lower portion, C, of the side pipe. The proper relative distance of the heads a and a is secured by studs c, forming a part of the same casting with the head c.

ln the act of pumping the water enters the hollow piston H from the upper and lower portions of the cylinder, respectively, through the ports I and I', which are closed alternately' by one double-acting valve, J, which on each full descent of the piston is slightly opened by the impact of its stemj with the pump bottom, so that the pistonvalve is self opening on the cessation of the pumping action. It will be seen that the inlet-valve Gis also selfopening when at rest, because its gravity will cause it to assume the lowest position, so as to throw open the lower port, F. The ports I1" and I being thus self-opening, a free escape is provided for any water that may be left in the dischargevpipe, and hence a pump made on this plan cannot possibly freeze by the presence of water in those parts exposed to the external atmosphere.

I claim herein as new and of my inventionl. rIhe arrangement of side pipe, C C, closed at the ends and receiving water through the two-way inlet E, whose ports F and F are closed alternately by the one double-headed valve, G, 'substantially' as set forth.

2. The doubleheaded and self-emptying inlet-valve G a a b c, the samebeinginserted and put together and adapted to operate in the Ina-nner set forth.

In testimony of which invention I hereunto set my hand.

A. J. REYNOLDS. Witnesses:

GEO. H. KNIGHT, A. W. GRIFFITH. 

